Chemical Defense Mechanisms of Choke Cherry Trees When attacked by Tent Caterpillars.

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Presentation transcript:

Chemical Defense Mechanisms of Choke Cherry Trees When attacked by Tent Caterpillars

Physical defenses Hooks, spines (cactus) Dense trichomes (leaf hairs) Magnolia Overall leaf toughness such as the leaves in an oak tree. Leaf toughness tends to increase as the summer season progresses.

Chemical defenses Systemic chemical defenses are present is some effective levels in the plant at all times. Example is salicylic acid in willow trees, tannic acid in oaks

Induced chemical defenses may by synthesized upon attack by herbivores. Let’s look at figure on page 771.